Event: Division 1

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Opponent Rating Result
Joao AA Santos 1969 0 - 1
Qixiang Han 1968 0 - 1
Marceli Ciesielski 1953 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1830 = (5890 + 400 * (1 - 2)) / 3)

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